Sintered Nd–Fe–B permanent magnets exhibit excellent magnetic properties and are widely used in industry as essential components of energy applications [1]. However, these types of magnets could not be used for some commercial applications due to their very low resistance against corrosion in various ambient environments [2–3].

This work lies on a comparative study of the effect of the magnetized fields on the corrosion behavior of NdFeB permanent magnets at different solutions, which are NaCl and Na₂SO₄. Corrosion resistance was investigated by electrochemical techniques in the aim to monitor the open-circuit potential, the impedance spectroscopy (EIS) and the polarization curves. We observe that during corrosion the electrochemical process is influenced by the existence of the magnetic field.